<?php

namespace Hybridauth\Adapter\Template\OAuth1\OAuthLib;

class OAuthRequest {
	protected $parameters;
	protected $http_method;
	protected $http_url;
	// for debug purposes
	public $base_string;
	public static $version = '1.0';
	public static $POST_INPUT = 'php://input';
	function __construct($http_method, $http_url, $parameters = NULL) {
		$parameters = ($parameters) ? $parameters : array ();
		$parameters = array_merge ( OAuthUtil::parse_parameters ( parse_url ( $http_url, PHP_URL_QUERY ) ), $parameters );
		$this->parameters = $parameters;
		$this->http_method = $http_method;
		$this->http_url = $http_url;
	}

	/**
	 * attempt to build up a request from what was passed to the server
	 */
	public static function from_request($http_method = NULL, $http_url = NULL, $parameters = NULL) {
		$scheme = (! isset ( $_SERVER ['HTTPS'] ) || $_SERVER ['HTTPS'] != "on") ? 'http' : 'https';
		$http_url = ($http_url) ? $http_url : $scheme . '://' . $_SERVER ['SERVER_NAME'] . ':' . $_SERVER ['SERVER_PORT'] . $_SERVER ['REQUEST_URI'];
		$http_method = ($http_method) ? $http_method : $_SERVER ['REQUEST_METHOD'];

		// We weren't handed any parameters, so let's find the ones relevant to
		// this request.
		// If you run XML-RPC or similar you should use this to provide your own
		// parsed parameter-list
		if (! $parameters) {
			// Find request headers
			$request_headers = OAuthUtil::get_headers ();

			// Parse the query-string to find GET parameters
			$parameters = OAuthUtil::parse_parameters ( $_SERVER ['QUERY_STRING'] );

			// It's a POST request of the proper content-type, so parse POST
			// parameters and add those overriding any duplicates from GET
			if ($http_method == "POST" && isset ( $request_headers ['Content-Type'] ) && strstr ( $request_headers ['Content-Type'], 'application/x-www-form-urlencoded' )) {
				$post_data = OAuthUtil::parse_parameters ( file_get_contents ( self::$POST_INPUT ) );
				$parameters = array_merge ( $parameters, $post_data );
			}

			// We have a Authorization-header with OAuth data. Parse the header
			// and add those overriding any duplicates from GET or POST
			if (isset ( $request_headers ['Authorization'] ) && substr ( $request_headers ['Authorization'], 0, 6 ) == 'OAuth ') {
				$header_parameters = OAuthUtil::split_header ( $request_headers ['Authorization'] );
				$parameters = array_merge ( $parameters, $header_parameters );
			}
		}

		return new OAuthRequest ( $http_method, $http_url, $parameters );
	}

	/**
	 * pretty much a helper function to set up the request
	 */
	public static function from_consumer_and_token($consumer, $token, $http_method, $http_url, $parameters = NULL) {
		$parameters = ($parameters) ? $parameters : array ();
		$defaults = array (
				"oauth_version" => OAuthRequest::$version,
				"oauth_nonce" => OAuthRequest::generate_nonce (),
				"oauth_timestamp" => OAuthRequest::generate_timestamp (),
				"oauth_consumer_key" => $consumer->key
		);
		if ($token)
			$defaults ['oauth_token'] = $token->key;

		$parameters = array_merge ( $defaults, $parameters );

		return new OAuthRequest ( $http_method, $http_url, $parameters );
	}
	public function set_parameter($name, $value, $allow_duplicates = true) {
		if ($allow_duplicates && isset ( $this->parameters [$name] )) {
			// We have already added parameter(s) with this name, so add to the list
			if (is_scalar ( $this->parameters [$name] )) {
				// This is the first duplicate, so transform scalar (string)
				// into an array so we can add the duplicates
				$this->parameters [$name] = array (
						$this->parameters [$name]
				);
			}

			$this->parameters [$name] [] = $value;
		} else {
			$this->parameters [$name] = $value;
		}
	}
	public function get_parameter($name) {
		return isset ( $this->parameters [$name] ) ? $this->parameters [$name] : null;
	}
	public function get_parameters() {
		return $this->parameters;
	}
	public function unset_parameter($name) {
		unset ( $this->parameters [$name] );
	}

	/**
	 * The request parameters, sorted and concatenated into a normalized string.
	 *
	 * @return string
	 */
	public function get_signable_parameters() {
		// Grab all parameters
		$params = $this->parameters;

		// Remove oauth_signature if present
		// Ref: Spec: 9.1.1 ("The oauth_signature parameter MUST be excluded.")
		if (isset ( $params ['oauth_signature'] )) {
			unset ( $params ['oauth_signature'] );
		}

		return OAuthUtil::build_http_query ( $params );
	}

	/**
	 * Returns the base string of this request
	 *
	 * The base string defined as the method, the url
	 * and the parameters (normalized), each urlencoded
	 * and the concated with &.
	 */
	public function get_signature_base_string() {
		$parts = array (
				$this->get_normalized_http_method (),
				$this->get_normalized_http_url (),
				$this->get_signable_parameters ()
		);

		$parts = OAuthUtil::urlencode_rfc3986 ( $parts );

		return implode ( '&', $parts );
	}

	/**
	 * just uppercases the http method
	 */
	public function get_normalized_http_method() {
		return strtoupper ( $this->http_method );
	}

	/**
	 * parses the url and rebuilds it to be
	 * scheme://host/path
	 */
	public function get_normalized_http_url() {
		$parts = parse_url ( $this->http_url );

		$scheme = (isset ( $parts ['scheme'] )) ? $parts ['scheme'] : 'http';
		$port = (isset ( $parts ['port'] )) ? $parts ['port'] : (($scheme == 'https') ? '443' : '80');
		$host = (isset ( $parts ['host'] )) ? strtolower ( $parts ['host'] ) : '';
		$path = (isset ( $parts ['path'] )) ? $parts ['path'] : '';

		if (($scheme == 'https' && $port != '443') || ($scheme == 'http' && $port != '80')) {
			$host = "$host:$port";
		}
		return "$scheme://$host$path";
	}

	/**
	 * builds a url usable for a GET request
	 */
	public function to_url() {
		$post_data = $this->postdata_httprequest ();
		$out = $this->get_normalized_http_url ();
		if ($post_data) {
			$out .= '?' . $post_data;
		}
		return $out;
	}

	/**
	 * builds the parameters into a string
	 */
	public function postdata_httprequest() {
		return OAuthUtil::build_http_query ( $this->get_postdata() );
	}

	public function get_postdata() {
		return $this->parameters;
	}

	/**
	 * builds the Authorization: header
	 */
	public function to_header($realm = null) {
		$first = true;
		if ($realm) {
			$out = 'Authorization: OAuth realm="' . OAuthUtil::urlencode_rfc3986 ( $realm ) . '"';
			$first = false;
		} else
			$out = 'Authorization: OAuth';

		$total = array ();
		foreach ( $this->parameters as $k => $v ) {
			if (substr ( $k, 0, 5 ) != "oauth")
				continue;
			if (is_array ( $v )) {
				throw new OAuthExceptionPHP ( 'Arrays not supported in headers' );
			}
			$out .= ($first) ? ' ' : ',';
			$out .= OAuthUtil::urlencode_rfc3986 ( $k ) . '="' . OAuthUtil::urlencode_rfc3986 ( $v ) . '"';
			$first = false;
		}
		return array($out);
	}
	public function __toString() {
		return $this->to_url ();
	}
	public function sign_request($signature_method, $consumer, $token) {
		$this->set_parameter ( "oauth_signature_method", $signature_method->get_name (), false );
		$signature = $this->build_signature ( $signature_method, $consumer, $token );
		$this->set_parameter ( "oauth_signature", $signature, false );
	}
	public function build_signature($signature_method, $consumer, $token) {
		$signature = $signature_method->build_signature ( $this, $consumer, $token );
		return $signature;
	}

	/**
	 * util function: current timestamp
	 */
	private static function generate_timestamp() {
		return time ();
	}

	/**
	 * util function: current nonce
	 */
	private static function generate_nonce() {
		$mt = microtime ();
		$rand = mt_rand ();

		return md5 ( $mt . $rand ); // md5s look nicer than numbers
	}
}
